CH552219A - MEASURING CIRCUIT ARRANGEMENT FOR DETERMINING IMMEDIATE DIFFERENCES OF AN INPUT SIGNAL FROM A REFERENCE FREQUENCY. - Google Patents

MEASURING CIRCUIT ARRANGEMENT FOR DETERMINING IMMEDIATE DIFFERENCES OF AN INPUT SIGNAL FROM A REFERENCE FREQUENCY.

Info

Publication number
CH552219A
CH552219A CH741573A CH741573A CH552219A CH 552219 A CH552219 A CH 552219A CH 741573 A CH741573 A CH 741573A CH 741573 A CH741573 A CH 741573A CH 552219 A CH552219 A CH 552219A
Authority
CH
Switzerland
Prior art keywords
input signal
circuit arrangement
reference frequency
measuring circuit
differences
Prior art date
Application number
CH741573A
Other languages
German (de)
Original Assignee
Abex Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abex Corp filed Critical Abex Corp
Publication of CH552219A publication Critical patent/CH552219A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)
CH741573A 1972-07-24 1973-05-24 MEASURING CIRCUIT ARRANGEMENT FOR DETERMINING IMMEDIATE DIFFERENCES OF AN INPUT SIGNAL FROM A REFERENCE FREQUENCY. CH552219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27420372A 1972-07-24 1972-07-24

Publications (1)

Publication Number Publication Date
CH552219A true CH552219A (en) 1974-07-31

Family

ID=23047222

Family Applications (1)

Application Number Title Priority Date Filing Date
CH741573A CH552219A (en) 1972-07-24 1973-05-24 MEASURING CIRCUIT ARRANGEMENT FOR DETERMINING IMMEDIATE DIFFERENCES OF AN INPUT SIGNAL FROM A REFERENCE FREQUENCY.

Country Status (10)

Country Link
US (1) US3755734A (en)
JP (2) JPS4946776A (en)
CA (1) CA972036A (en)
CH (1) CH552219A (en)
DE (1) DE2325641A1 (en)
FR (1) FR2193978B1 (en)
GB (1) GB1418773A (en)
IT (1) IT980189B (en)
NL (1) NL156511B (en)
SE (1) SE394033B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319329A (en) * 1980-02-21 1982-03-09 Iowa State University Research Foundation, Inc. Frequency measuring and monitoring apparatus, methods and systems
JPS57112997U (en) * 1981-01-05 1982-07-13
US4547726A (en) * 1983-08-01 1985-10-15 General Electric Company Means and method for measuring power system frequency
US5721689A (en) * 1995-12-18 1998-02-24 Abb Power T&D Company Inc. System and method for phasor estimation and frequency tracking in digital protection systems
US6185482B1 (en) 1998-03-10 2001-02-06 Abb Power T&D Company Inc. System and method for rms overcurrent backup function
JP2010271091A (en) 2009-05-20 2010-12-02 Seiko Epson Corp Frequency measuring device
JP5440999B2 (en) * 2009-05-22 2014-03-12 セイコーエプソン株式会社 Frequency measuring device
JP5517033B2 (en) 2009-05-22 2014-06-11 セイコーエプソン株式会社 Frequency measuring device
JP5582447B2 (en) 2009-08-27 2014-09-03 セイコーエプソン株式会社 Electric circuit, sensor system including the electric circuit, and sensor device including the electric circuit
JP5815918B2 (en) 2009-10-06 2015-11-17 セイコーエプソン株式会社 Frequency measuring method, frequency measuring apparatus, and apparatus provided with frequency measuring apparatus
JP5876975B2 (en) 2009-10-08 2016-03-02 セイコーエプソン株式会社 Frequency measuring device and method of generating shift frequency division signal in frequency measuring device
JP5883558B2 (en) 2010-08-31 2016-03-15 セイコーエプソン株式会社 Frequency measuring device and electronic device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480128A (en) * 1945-10-03 1949-08-30 Standard Telephones Cables Ltd Frequency measuring system
US3119064A (en) * 1961-12-01 1964-01-21 Hughes Aircraft Co Quadrature phase detector employing transistor switching means

Also Published As

Publication number Publication date
JPS4946776A (en) 1974-05-04
US3755734A (en) 1973-08-28
DE2325641A1 (en) 1974-02-14
FR2193978A1 (en) 1974-02-22
GB1418773A (en) 1975-12-24
SE394033B (en) 1977-05-31
NL156511B (en) 1978-04-17
CA972036A (en) 1975-07-29
NL7306726A (en) 1974-01-28
FR2193978B1 (en) 1977-07-29
JPS542475U (en) 1979-01-09
IT980189B (en) 1974-09-30

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Legal Events

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